he told supporters in san francisco they must be almost obsessive in getting out the vote. the president and mitt romney returned to the crucial state of ohio later today to campaign in that critical state. >>> first lady michelle obama is sharing a bit of what goes on behind the closed doors of the white house. in a "nightline" interview she told abc's cynthia mcfadden she rarely steps foot in fact in the west wing and steers clear of trying to influence her husband's policies, instead sticking to her own causes like fighting childhood obesity. mrs. obama also talked about how comfortable the president is around women. >> this is one of the things i love about barack. he is so used to having strong women in his life. you know, it's odd. i tell him that this is somehow, you know, god keeping his testosterone in check because, really, he is surrounded by women. >> the first lady says she no longer has doubts that they're doing what is best for their family and for the country as well. >>> the search for a missing fifth grader near denver is still coming up empty. police look